Sunshade of a truck cab



FIG. 1 is a left, front perspective view of a sunshade of a truck cab shown installed on a truck cab showing our new design, it being understood that the broken lines on all figures are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is an enlarged top view thereof;

FIG. 3 is an enlarged front view thereof;

FIG. 4 is an enlarged left side view thereof; and,

FIG. 5 is an enlarged right side view thereof. 

The ornamental design for a sunshade of a truck cab, as shown and described. 